MC34115 Datasheet, PDF (1/16 Pages) Motorola, Inc – CONTINUOUSLY VARIABLE SLOPE DELTA MODULATOR/DEMODULATOR

Order this document by MC34115/D
MC34115
Continuously Variable Slope
Delta Modulator/Demodulator
Providing a simplified approach to digital speech encoding/decoding, the
MC34115 CVSD is designed for speech synthesis and commercial telephone
applications. A single IC provides both encoding and decoding functions.
• Encode and Decode Functions Selectable with a Digital Input
• Utilization of Compatible I2L – Linear Bipolar Technology
• CMOS Compatible Digital Output
• Digital Input Threshold Selectable (VCC/2 Reference Provided On–Chip)
• 3–Bit Algorithm
CONTINUOUSLY VARIABLE
SLOPE DELTA
MODULATOR/DEMODULATOR
SEMICONDUCTOR
TECHNICAL DATA
16
1
P SUFFIX
PLASTIC PACKAGE
CASE 648
CVSD Block Diagram
Encode/Decode
Clock
15
14
Analog Input ¹
–
Analog ²
Feedback
+
Digital ¹³
Data Input
–
+
Digital 12
Threshold
Vth
3–Bit
Shift Register
QQQQQQ
VCC
16
9
Digital Output
10
VCC/2 Output
VCC/2
Ref
IRef
IO
Integrator
Amplifier
–
+
Logic
Slope
Polarity
Switch
IInt
11 _Coincidence
Output
V/I
Converter
3 _{Syllabic Filter}
4 _{Gain Control}
IGC
7
56
8
Analog Ref Filter
VEE
Output Input Input
(+)
(–)
This device contains 144 active transistors.
16
1
DW SUFFIX
PLASTIC PACKAGE
CASE 751G
(SO–16L)
PIN CONNECTIONS
Analog Input (–) 1
Analog Feedback (+) 2
Syllabic Filter 3
Gain Control 4
Ref Input (+) 5
Filter Input (–) 6
Analog Output 7
VEE 8
16 VCC
15 Encode/Decode
14 Clock
13 Digital Data Input (–)
12 Digital Threshold
11 Coincidence Output
10 VCC/2 Output
9 Digital Output
(Top View)
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
MC34115P
TA = 0° to +70°C
MC34115DW
Plastic DIP
SO–16L
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1996
Rev 1
1